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Current goals Decrease emittance of beam Study the influence of the sector magnet Confirm field index, n = 1 Widen magnet poles Find optimum pole separation and angle Plot good field region Make improved poles and test them …Then move on to the extractor!

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How the shape of the field index varies Pole face angle Separation of poles modified to give an n = 1 field at R = 80 for each angle. 7 degree poles couldn’t be squeezed close enough together without hitting the extract.